pH dependence of the photoluminescence of Eu3+-Intercalated layered titanium oxide

Shintaro Ida, Chikako Ogata, Yasumichi Matsumoto

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We investigated the pH dependence of Eu3+ emissions from Eu 3+-intercalated layered titanium oxide (Eu/TiO) and evaluated the local structure of the intercalated Eu3+ at varying pH values using lifetime measurements and EXAFS. A red Eu3+ emission was observed under radiation by Uv light with a higher energy than the band gap of the host TiOx layer. The emission is based on energy transfer from the host TiOx layer to Eu3+. The emission intensity of Eu/TiO in 0.01 M NaOH aqueous solution was stronger than that in 0.01 M HCl aqueous solution, and the emission response of the Eu/TiO film was relatively stable to pH cycling. Two phenomena may provide a mechanism for the change in emission from Eu/TiO. One is a change in the efficiency of energy transfer from the TiOx nanosheet to Eu3+, and the other is a fine hydration state change of Eu3+ without a change in the total water amount.

Original languageEnglish
Pages (from-to)1896-1900
Number of pages5
JournalJournal of Physical Chemistry C
Volume113
Issue number5
DOIs
Publication statusPublished - Feb 5 2009

Fingerprint

Titanium oxides
titanium oxides
Energy transfer
Photoluminescence
photoluminescence
Nanosheets
Hydration
Energy gap
Radiation
Water
energy transfer
aqueous solutions
hydration
titanium dioxide
life (durability)
cycles
radiation
water

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

pH dependence of the photoluminescence of Eu3+-Intercalated layered titanium oxide. / Ida, Shintaro; Ogata, Chikako; Matsumoto, Yasumichi.

In: Journal of Physical Chemistry C, Vol. 113, No. 5, 05.02.2009, p. 1896-1900.

Research output: Contribution to journalArticle

Ida, Shintaro ; Ogata, Chikako ; Matsumoto, Yasumichi. / pH dependence of the photoluminescence of Eu3+-Intercalated layered titanium oxide. In: Journal of Physical Chemistry C. 2009 ; Vol. 113, No. 5. pp. 1896-1900.
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